legislation_cosponsors: 119-hr-945, S001216

Cosponsors for tracked legislation. Distinguishes original cosponsors (signed on at introduction) from later additions. Linked to congress_members via bioguide_id.

This data as json

bill_id	bioguide_id	full_name	party	state	sponsorship_date	is_original_cosponsor
119-hr-945	S001216	Rep. Schrier, Kim [D-WA-8]	D	WA	2025-03-18	0